CFD investigation of indoor hygrothermal and airflow profile in academic research storage room: effect of lma on thermohygric balance and mould growth

Ali, Maisarah and Oladokun, Majeed and Osman, Samsul Bahrin and Samsuddin, Niza and Hamzah, Hairul Aini and Ibrahim, Md Najib (2017) CFD investigation of indoor hygrothermal and airflow profile in academic research storage room: effect of lma on thermohygric balance and mould growth. ARPN Journal of Engineering and Applied Sciences, 12 (10). pp. 3080-3087. ISSN 1819-6608

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Abstract

Ventilation systems maintain thermal comfort and indoor air quality for the building envelopes, occupants and furnishings. The systems often perform in opposite to the design intents despite its high energy outlay. Hence, the need to provide energy efficient buildings without compromising the design purposes had produced various ventilation performance metrics. This study investigates the effect of Local Mean Age (LMA) of air on indoor thermal and hygric balance as well as mould growth. In-situ experiments were combined with computational fluid dynamics (CFD) simulation to assess the indoor hygrothermal and the airflow profile in a mechanically ventilated research store with known history of mould growth. A commercial CFD analysis with the standard k–ε model was used in the CFD simulation. The measurement and validation of the model are reported in a companion paper. The study found that hygrothermal profiles in the stacks depends on airflow field. In most cases, high hygric profile is synonymous with elevated LMA. The poorest locations in LMA shown highest thermohygric balance and visible mould growth on the stored items. The findings suggest that LMA has a significant effect on hygrothermal stratifications as well as indoor mould growth risk.

Item Type:	Article (Journal)
Additional Information:	4627/44415
Uncontrolled Keywords:	FD Simulation Indoor Air Quality (IAQ)Local Mean Age, Thermohygric Balance, Mould Growth Risk
Subjects:	T Technology > TH Building construction > TH7005 Heating and ventilation
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Allied Health Sciences > Department of Biomedical Science (Effective:1st July 2011) Kulliyyah of Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering Kulliyyah of Medicine > Department of Basic Medical
Depositing User:	Prof Ir Maisarah Ali
Date Deposited:	27 Jan 2016 12:52
Last Modified:	16 Apr 2018 09:27
URI:	http://irep.iium.edu.my/id/eprint/44415

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